For complex and relatively high-dollar sales (five to six figures), it's a common practice to present the final cost in the form of a proposal, and to present that proposal in person, instead of emailing/mailng a copy for the prospect to look at on their own.. Everyone expects that, and I don't think that "one more meeting" is a burden for anyone.
From a sales standpoint, the in-person proposal is a very valuable tool to answer any immediate questions and keep the conversation going towards purchase. Of course, with the Internet, things change, and there's no good way to do that same presentation.
How do you mitigate this? Schedule a web-meeting and present via slides? Call up, then click the "send" button?
Or, just avoid this all together and send the proposal via email and hope they don't misunderstand (or get sticker shock)?